I agree the other comments. 3 tangs in a 4’ tank is a hard no. I’ve been in the business and hobby for over 20 years, if that makes you feel better. There is a reason I have several fish that are well over 15 years old.
Your LFS will sell you 5 tangs for a 4’ tank, they’re in business to make money.
But I have to ask, why even make this post if you’re going to poo poo everyone’s advice?
The LFS owner is a family friend. We've known them for over 15 years and she has repeatedly said no to me on multiple occasions. I originally had 4 tangs on my stocking list and she flat out told me no. I bought the tank used and the previous owner had 3 tangs a large angel and a foxface in it for over 5 years until he had to take it down due to financial reasons.
Just to clear up any misunderstandings, my original point of making this post was to seek suggestions on which tang species might be best suited for this tank, rather than debating whether it is possible to keep a third tang or not.
While I know some of you are against keeping a third tang, I appreciate your concern, but I was really looking for some suggestions on which species might be best suited to coexist with my blue hippo tang and yellow tang in my 4×2×2 tank rather than being flat out told it couldn't be done.
If any of you have any experience with any of these tang species, such as a convict tang, chocolate tang, or any other species that are known to be less aggressive, it would be greatly appreciated!